Nanoscale “DNA Baskets” for the Delivery of siRNA
Silencing of gene expression by small interfering RNA (siRNA) is promising for drug target discovery and as a therapy. However, a major impediment to the practical use of this technology is an inherent instability of siRNA in the bloodstream, partly due to susceptibility to nucleases. To address this restriction, we evaluated a novel DNA/albumin-based siRNA delivery vehicle that forms a “basket” surrounding the siRNA and provides both steric separation of siRNA from nucleases and local excess of the substrate for nuclease action; thus, slowing the rate of the degradation of siRNA. We found that variation of the albumin concentration in basket construction can significantly decrease the mean size of the basket. Smaller siRNA-containing DNA baskets may increase cellular uptake. We found that the degradation of siRNA is delayed when siRNA is prepared with this delivery vehicle, implying that DNA baskets are a promising technology for further development as the delivery vehicle for siRNA therapeutics.
KeywordsHuman Serum Albumin Delivery Vehicle Bovine Serum Albumin Concentration Drug Target Discovery Local Excess
Unable to display preview. Download preview PDF.